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| Criterion |  Decision Making Delphi Method |  DevOps Blameless Postmortem |  Operations Family Tree Analysis |
|---|---|---|---|
Purposedifferent | When knowledge is distributed and direct dominance should be avoided, groups quickly fall under the sway of their opinion leaders. The Delphi Method gathers assessments iteratively and gradually brings expert judgments closer together. | After an incident with damage or a near miss, the method creates a sober field for learning without assigning blame. It directs attention to the course of events, conditions, and effective countermeasures. | For a series of incidents with a similar pattern, the method arranges individual events as branches of a common origin. It makes visible which conditions keep recurring. |
Complexitydifferent | High | Medium | Medium |
Timedifferent | 1-4 Wochen | 30-90 min | 2-4 h |
Participantsdifferent | 6-30 Experten | 3-12 | 2-6 |
Formatdifferent | Async | Workshop + async | Workshop + async |
Outputdifferent | Expert Forecast, Consensus Range, Assumption Notes | Postmortem Doc, Action Items, Timeline | Family Tree Diagram, Pattern Notes, Systemic Measures |
Tagsno overlap | ForecastingExpertsDecisionStrategy | Site Reliability EngineeringIncidentLearningReliability | Root causePatternsIncidentSystemic |
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